Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f274d6514726261…

MALICIOUS

PDF

78.7 KB Created: 2021-05-12 08:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ddaaec7ef6aecb29ba448bcd593aa99 SHA-1: 40b4fab629ad2c57cba0937b3aa2a6adc0c1a9b3 SHA-256: 1f274d651472626111cca01a1b90250938984e16e17082a71625c189a8ecfe8c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI that directs the user to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the nature of the PDF content suggest an attempt to trick the user into visiting a malicious site, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vilenefex.ru/strik?utm_term=how+to+row+on+the+total+gym
    • http://blubadgehelp.net/wikonovipemjfyor.pdf
    • http://bexemusu.mypressonline.com/5115861637.pdf
    • http://supportcopyright.net/41706804996lj27.pdf
    • http://rowefuzoj.mygamesonline.org/kedebupidaxuzefibuwux.pdf
    • http://imedo.ru/mosefamedereludiduvojatqsxd8.pdf
    • http://tadugebakonuged.getenjoyment.net/udemy_interior_design_free_course.pdf
    • http://wowunoli.22web.org/witevuvozojesif.pdf
    • http://clubstore.info/lasadijodng508.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f35d6857-a3f9-41bb-bda8-479d524f4dbf/flash_canon_430ex_ii_manual.pdf
    • https://uploads.strikinglycdn.com/files/a4a0fd49-ae28-4d7d-b883-d703246b810e/41623552386.pdf
    • https://uploads.strikinglycdn.com/files/22edf5de-c057-495f-b58f-1cc7ad592220/japanese_video_games_online_store.pdf
    • http://tigagatu.atwebpages.com/anabaena_azollae.pdf
    • https://uploads.strikinglycdn.com/files/a103697b-f715-4d4f-9139-3d506f8ba74f/ncdot_construction_entrance_detail.pdf
    • http://sajatuvireguta.atwebpages.com/molupananiwimodo.pdf
    • https://uploads.strikinglycdn.com/files/a1a81d00-bcf4-46fc-bf33-3adb2c23b681/golotabojubod.pdf
    • http://bulumufojade.rf.gd/livro_walden_two.pdf
    • https://uploads.strikinglycdn.com/files/3355fad9-3e7e-43c7-9d9f-33a776ffeb7b/jaybird_x3_not_pairing_with_iphone.pdf
    • http://bitujiduruv.myartsonline.com/ryobi_2000_psi_pressure_washer_parts_home_depot.pdf
    • https://uploads.strikinglycdn.com/files/d73326d1-dbfb-4f3c-b3e2-ffaaf43bb448/6097162297.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e53c.bin
127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE53C 6744 bytes
font_01_sfnt_off0000f623.bin
3d8a070467fb3c0f781a57e2d61725f6ba7e53925de9bd33b63954ae5f423cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF623 5076 bytes
font_02_sfnt_off00010753.bin
468917e93e532f7652589ffa959c7ea8fd9397af695388de02a8723a0c8bf90e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10753 11020 bytes

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